Back to the original question, I would think that having the fans at the same height would be better. It appears that it is expected that this cooler will overhang the memory slots:
http://www.silentpcreview.com/article1395-page3.html
(Photos 3 & 6 with captions)
http://www.silentpcreview.com/article1395-page3.html
(Photos 3 & 6 with captions)
